TECHNOLOGY | COLOUR MEASUREMENT
CM-3700A Plus can be connected with colour management software, such as SpectraMagic NX2, he added. Cosh noted that consistency and reproducibility of colour measurement are essential for maintaining brand colour standards across batches. In addition,
accuracy and inter-instrument agreement are important consistent results across different locations and production lines. Tight tolerance
Above: Datacolor recently
launched the Datacolor Spectro P Series of portable spectropho- tometers designed primarily for QC and spot checking
control, measured by the overall colour difference from the standard (∆E*), is necessary to meet speci- fications and to detect out-of-specification material, which minimises waste and rework, he explained. He noted that measurement issues can pose challenges to achieving proper colour in com- pound and masterbatch production. In addition to thermochromaticity, poor sample uniformity (eg, inconsistent dispersion of pigments or uneven sample preparation) can lead to measurement variability. Variations in surface texture and gloss can also affect colour perception. Cosh noted that a best practice for minimising instrument variability is to use the same unit from the same manufacturer across locations and through supply chains. “Spectrophotometers have different illumination optics, and if multiple manufacturers and/or models are used, the optics should at least be the same configuration. It is also imperative that any and all instruments used should follow daily operator’s calibration and recommended factory certification (usually every 12 months),” he noted. Digital standards are increasingly used because they are easier to communicate and have a longer
shelf life than physical samples, particularly with organic coloring agents, said Salil Chawla, Global Product Manager, Benchtop Products, Datacolor. He noted that it can take time for companies who have been using handwritten recipes to transition to digital recipes, but some have started by using a digital standard when they create something new. There is a need for instruments that are easy to use and integrate without too much up-front training time, said Chawla. Datacolor’s SpectraVision instrument is a hyper-
spectral spectrophotometer, which is a more sophisticated instrument that collects multiple datapoints and creates a reflectance curve that can be used to communicate accurate colour results using Datacolor’s Tools SV software. The SpectraVi- sion V, introduced last year, has a vertical configura- tion and a sample holder that allows small samples to be measured.
Portable instruments Datacolor recently launched the Datacolor Spectro P Series, with two advanced portable spectropho- tometers designed primarily for QC and spot checking in industrial applications, enabling quick production decisions. Both are lightweight and can be linked to a single master instrument to ensure accurate consistency from the lab to the production floor. Measurements can be transmitted to the Datacolor Colibri platform, which is a cloud-based lifecycle management system, via Bluetooth or WiFi. “Our customers like their repeatable perfor- mance, ergonomics, and how well they comple- ment static spectrophotometers in their workflows,” said Chawla.
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